CEL keeps reseting itself

[Truck11]

Last week had 5 out of 8 cylinders with low voltage. The next day it reset itself so i figured it might not be a big deal. Yesterday the CEL came back on but with 7 out of 8 now with the same low voltage. Truck runs fine, doesnt miss a beat. Today the thing reset again!!! Why does my truck keep reseting if there is a problem?? I think its the FICM but like i said the drivability hasnt changed.

[djshum]

Your right, probably needs a ficm. Need to monitor pids to check ficm voltage. Probably falling short of the 48 volts it is looking for, but not enough to cause noticeable drive concern, besides check engine light.